Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films

Jong Whan Rhim; Seok In Hong; Chang Sik Ha

doi:10.1016/j.lwt.2008.02.015

Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films

Jong Whan Rhim, Seok In Hong, Chang Sik Ha

Research output: Contribution to journal › Article › peer-review

603 Citations (Scopus)

Abstract

PLA-based composite films with different types of nanoclays, such as Cloisite Na⁺, Cloisite 30B and Cloisite 20A, were prepared using a solvent casting method and their tensile, water vapor barrier and antimicrobial properties were tested. Tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) of control PLA film were 50.45 ± 0.75 MPa, 3.0 ± 0.1%, and 1.8 × 10^-11 g m/m² s Pa, respectively. TS and E of nanocomposite films prepared with 5 g of clay/100 g of PLA decreased 10-20% and 11-17%, respectively, depending on the clays used. On the contrary, WVP of the nanocomposite films decreased 6-33% through nanoclay compounding. Among the clay types used, Cloisite 20A was the most effective in improving the water vapor barrier property while sacrificing tensile properties the least. The effect of clay concentration tested using Cloisite 20A showed a significant decrease in TS and WVP, with increases in clay content. Among the PLA/clay composite films tested, only PLA/Cloisite 30B composite film showed a bacteriostatic function against Listeria monocytogenes.

Original language	English
Pages (from-to)	612-617
Number of pages	6
Journal	LWT - Food Science and Technology
Volume	42
Issue number	2
DOIs	https://doi.org/10.1016/j.lwt.2008.02.015
Publication status	Published - Mar 2009

Bibliographical note

Funding Information:
C. S. Ha wishes to thank to the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (MOST; M10300000369-06J0000-36910). He also thanks to Ms. Jinhee Ahn of Pusan National University to help the XRD measurements. S. I. Hong acknowledges the support by grant no. E071003 from the Food Nanotechnology Development Project of the Korea Food Research Institute.

Keywords

Antimicrobial activity
Composite film
Nanoclay
PLA
Physical property

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title = "Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films",

abstract = "PLA-based composite films with different types of nanoclays, such as Cloisite Na+, Cloisite 30B and Cloisite 20A, were prepared using a solvent casting method and their tensile, water vapor barrier and antimicrobial properties were tested. Tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) of control PLA film were 50.45 ± 0.75 MPa, 3.0 ± 0.1%, and 1.8 × 10-11 g m/m2 s Pa, respectively. TS and E of nanocomposite films prepared with 5 g of clay/100 g of PLA decreased 10-20% and 11-17%, respectively, depending on the clays used. On the contrary, WVP of the nanocomposite films decreased 6-33% through nanoclay compounding. Among the clay types used, Cloisite 20A was the most effective in improving the water vapor barrier property while sacrificing tensile properties the least. The effect of clay concentration tested using Cloisite 20A showed a significant decrease in TS and WVP, with increases in clay content. Among the PLA/clay composite films tested, only PLA/Cloisite 30B composite film showed a bacteriostatic function against Listeria monocytogenes.",

keywords = "Antimicrobial activity, Composite film, Nanoclay, PLA, Physical property",

author = "Rhim, {Jong Whan} and Hong, {Seok In} and Ha, {Chang Sik}",

note = "Funding Information: C. S. Ha wishes to thank to the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (MOST; M10300000369-06J0000-36910). He also thanks to Ms. Jinhee Ahn of Pusan National University to help the XRD measurements. S. I. Hong acknowledges the support by grant no. E071003 from the Food Nanotechnology Development Project of the Korea Food Research Institute.",

year = "2009",

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N1 - Funding Information: C. S. Ha wishes to thank to the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (MOST; M10300000369-06J0000-36910). He also thanks to Ms. Jinhee Ahn of Pusan National University to help the XRD measurements. S. I. Hong acknowledges the support by grant no. E071003 from the Food Nanotechnology Development Project of the Korea Food Research Institute.

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N2 - PLA-based composite films with different types of nanoclays, such as Cloisite Na+, Cloisite 30B and Cloisite 20A, were prepared using a solvent casting method and their tensile, water vapor barrier and antimicrobial properties were tested. Tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) of control PLA film were 50.45 ± 0.75 MPa, 3.0 ± 0.1%, and 1.8 × 10-11 g m/m2 s Pa, respectively. TS and E of nanocomposite films prepared with 5 g of clay/100 g of PLA decreased 10-20% and 11-17%, respectively, depending on the clays used. On the contrary, WVP of the nanocomposite films decreased 6-33% through nanoclay compounding. Among the clay types used, Cloisite 20A was the most effective in improving the water vapor barrier property while sacrificing tensile properties the least. The effect of clay concentration tested using Cloisite 20A showed a significant decrease in TS and WVP, with increases in clay content. Among the PLA/clay composite films tested, only PLA/Cloisite 30B composite film showed a bacteriostatic function against Listeria monocytogenes.

AB - PLA-based composite films with different types of nanoclays, such as Cloisite Na+, Cloisite 30B and Cloisite 20A, were prepared using a solvent casting method and their tensile, water vapor barrier and antimicrobial properties were tested. Tensile strength (TS), elongation at break (E), and water vapor permeability (WVP) of control PLA film were 50.45 ± 0.75 MPa, 3.0 ± 0.1%, and 1.8 × 10-11 g m/m2 s Pa, respectively. TS and E of nanocomposite films prepared with 5 g of clay/100 g of PLA decreased 10-20% and 11-17%, respectively, depending on the clays used. On the contrary, WVP of the nanocomposite films decreased 6-33% through nanoclay compounding. Among the clay types used, Cloisite 20A was the most effective in improving the water vapor barrier property while sacrificing tensile properties the least. The effect of clay concentration tested using Cloisite 20A showed a significant decrease in TS and WVP, with increases in clay content. Among the PLA/clay composite films tested, only PLA/Cloisite 30B composite film showed a bacteriostatic function against Listeria monocytogenes.

KW - Antimicrobial activity

KW - Composite film

KW - Nanoclay

KW - PLA

KW - Physical property

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Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films

Abstract

Bibliographical note

Keywords

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